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(No Model) 2 Sheets-Sheet 1. P. W. JENKINS.

A PPARATUS FOR CUTTING PACKING.

No. 288,339. Patented Nov. 13, 1883.

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P. W. JENKINS APPAR TU FOR CUTTING PAGKING. No. 288,339. Patented Nov;13,; 1883.

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' g7 My v UNITED STATES a terials, and forother analogous purposes.

. quantities in connection with steam,hydraulic,

by which the labor and expense attending and packings are required makesit impractii art that washers and packings made of these pensive thatthe large number which would sheets of pasteboard, rubber, or anysimilar suit-able material, and which shall also be so result, all ofwhich will be hereinafter fully A and 2 are central vertical sections ofthe two 5 packing; Fig. 3 is a plan View of Fig.1, the

FRANKYW. Jenkins, or BROOKLYN, NEWYORK.

APPARATUS FOR CUTTING PACKINGS."

SPECIFICATION forming part of Letters Patent No.288,339, dated November13, 1883.

Application filed AugustLl, 1883. (Xomode1 To aid whom it may concern:

Be it known that I, FRANK WV. JENKINS, a citizen of the United States,residing in the city of Brooklyn, county of Kings, and State of NewYork, have invented certain new and useful Improvements in Apparatus forCutting .Packings, fully describedand represent ed in the followingspecification and the accompanyin g drawings, forming a part of thesame. This invention relates to an apparatus for cutting washers andpacking-ringsfrom sheets of pasteboard, rubber, and other similar ma-It'is well known to those familiar with the and similar materials areusedin such large and other similar machinery that any means theirproduction can be reduced is a matter of considerable importance. Thegreatvariety of sizesand shapes in which these washers cableto providesteel cutting dies or punches for their production, as such tools are soex-- be required to produce all the necessary sizes and shapes wouldmake the outlay too great.

It has therefore been customary to out these washers and packings byhand,which method not only involves great labor and annoyance,

but results in the production of irregular and imperfect work.

It is the object of the present invention to provide a simple tool orapparatus by which these washers and packings in any size or shape canbe rapidly and accuratelycut from inexpensive that it will be entirelypracticable to provide a separate apparatus for each size and shaperequired.

To these ends the invention consists in various details of constructionand combinations of parts in an apparatus foraccomplishing thisexplained andpartieularly pointed out.

In the accompanying drawings, Figures 1 parts of. an apparatus embodyingthe present inventionfor producing a round washer or pnnchesconsists oftwo principal parts the view of Fig. 6, with the male member of thepunch removed. Fig. 10 is a plan view of Fig. 7, the male member of thepunch being removed. Fig. 11 is a viewsimilar to Fig. 6, l but showingthe male member of the punch in a different position; and Figs. 12 and13 are views illustrating the steps or operations involved inthe'production of such a packing.

Referring to said figures, it will be seen that the apparatuscompleteconsists of two separate and independent punches, A Bgth'e first beingadapted to out the disk or blank to form the washer or packing, and thesecond to cut the required openings therein. Each of these male memberor punch proper, a, and thefemale memberhaving the die-opening b, thefemalemember or die being in turn composed of two parts, 0 d, betweenwhich the material to be cut is held. p

The die-opening b of the punch A is made of the size and, shape of theoutside periphery of the washer or packing which is to be produced-as,for example, round, as shown in Figs, 1 and 3, or oval, as shown inFigs. 6 and 9the punch or male member a being an exact counterpartthereof, and fitting snugly therein. The part0 rests upon thepart d, andis held in proper register therewith by two or moredowel-pins, e.

The operation of the punch A is as follows: The parts a. 0 being removedfrom the part d, the sheet of material f, from which the washer orpacking 'is to be cut, is impaled upon the pins 6, and the parts isplaced in position, the weight of the part 0 serving to hold thematerial f down firmly like a drum-head, and aid the cutting of the samebyallowing no opportunity for the material to change its position.Themale member a is then placed in the dieopening and allowed to restupon the sheet f. When the parts are in thisposition, by striking thepunch a a sudden blow with a mallet or hammer it will be forceddownward, and as the abrupt edges of the parts a d pass each other thedisk or blank 9 will be sheared or broken out of the sheet f, as shownin Figs. 4:, 11, and 12. It is found in practice that the cut thus made,even when the sheet f is of the toughest material, will not be ragged,but will be as abrupt and clean as if madeby knifeedges.

The die-opening b of the punch B is made of the size and shape of theinner periphery of the washer or packing, which is round, as illustratedin the present case, but may of course be oval, square, or of any otherrequired form, the punch or male member a being in this case, as in thecase of the punch A, the exact counterpart of such opening, and fittingsnugly therein. The part cl is in this case provided with a recess, h,of the shape of the blank 9, so that said blank will be held in properposition with relation to the punch a and the die-opening, the part abeing provided witha flange, 70, which fits into said recess and holdsthe blank in position and the parts 0 d in proper register.

The operation of the punch B is as follows: The blank g, having beenformed by the punch A, as just described, is placed in the recess h ofthe companion punch, B, and the part c is placed in position, as shownin Figs. 2 and 7 The punch a, being thus placed in the dieopening andallowed to rest upon the blank is struck, as before described, whichwill force it downward, so as to remove the central portion, Z, andcomplete the washer or packing, as shown in Figs. 5 and 13. 1

If it is desired to provide the packing with bolt-holes, as m, as shownin Fig. 13, the

punch B may be provided with supplemental punches n and die-openings o,as shown in Figs. 7 and 10, by which such holes can be punched at thesame time with the central opening.

Whenever the lower edge of the male member of one of the punches becomesrounded from long use, the same can be readily renewed and made as goodas new by simply dressing off a small portion of the face, so as topresent a new edge.

When it is desired to produce a series of packings ofregularly-decreasing sizes, it will not be necessary to provide twopunches for each size, as in many cases the part Z, cut from onesize,will be of the proper size for forming the blank 9 for the neXtsmaller size.

By means of a pair of punches such as just ClCSOl'lbt d it will readilybe seen that washers or packings can be easily and rapidly made, andthat such paekings will be smoothly and evenly cut and exactly uniformin size.

By making the punches of the construction herein shown, I have foundthat perfect results can be attained when all of the parts are made ofcommon cast-iron, which so reduces the cost of construction that aseparate pair of punches can be. provided for each size and shape ofpacking at a comparatively trifling cost;

Vhat I claim is Y 1. The combination, with the female member made intwoparts, as 0 and d, between which the material is clamped and held whilebeing cut, and provided with a die-opening, as b, ex-

tending into both of said parts, of the male 7 cutting member arrangedto reciprocate in said opening, substantially as described.

2. The combination, with the female member made in two parts, as 0 (Z,between which the material is clamped and held while being cut, andprovided with a plurality of die-openings, as b 0, extending into bothof said parts, of the male cutting members, as a 11, arranged toreciprocate in said openings, substantially as described.

3. The combination, with the female member made in two parts, as c d,between which the material is clamped and held while being cut, andprovided with a recess, as h, and flange, as k, and a die-opening, asI), extending into both of said parts, of themale cutting memberarranged to reciprocate in said open-. ing, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRANK WV. JENKINS. Vitnesses:

J. A. HOVEY, T. H. PALMER.

